Manchester United target Marcos Rojo has apologised to Sporting Lisbon for refusing to train in an attempt to force a move.

Rojo returns to training with the Portuguese club on Monday after accepting that he was out of line. United are interested in the defender and reportedly bid £16 million for the World Cup finalist, who seemed to be doing his best to secure an exit.

However, he has backtracked, saying: "I was hot-headed and I'm sorry. I'll be back with the rest of the squad tomorrow [Monday]. Sporting signed me when I was not at my best and gave me the opportunity to play for a big club in Europe.

"I would like to thank the trust they had in me and I will resume training on Monday."

United turned to Rojo after two of their main defensive targets eluded them with Mats Hummels staying at Borussia Dortmund and Thomas Vermaelen joining Barcelona.

The left-back has also been at the centre of a row between Sporting and sports investment company Doyen, who reportedly stood to earn 75% of the proceeds from his sale. Sporting terminated the agreement with Doyen after accusing them of conspiring with other clubs to ensure bids came in for Rojo.

After enduring a tricky start to his Manchester United career, perhaps it is fair that Marcos Rojo celebrated so boisterously as he watched his first professional club Estudiantes beat fierce rivals Gimnasia